Fisto is a large and muscular warrior with reddish-brown hair and a beard, distinguishable mainly by his right hand, which is a large metal fist. In the original continuity of the character it is ambiguous as to whether Fisto's metal hand is some kind of removable gauntlet, or if it is a prosthetic attachment. In the 2002 continuity, Fisto's hand is much larger and unambiguously cybernetic. In both versions his fist is able to smash through rock and other hard surfaces, as well as packing more than a punch with the enemy.

Origin #1 (Filmation Cartoons)

The Baritone-voice famously loyal and dependable Fisto is the only Heroic Warrior with strength comparable to that of He-Man. Fisto once served Skeletor and terrorized a small village by cutting off their water supply. When the Heroic Warriors were alerted of the situation Fisto fought back, placing them in danger. He-Man arrived just in time to witness Fisto join the side of good. Fisto has a great deal of respect for He-Man because he is one of the few people that gave him a chance when he turned away from evil. Apart from having well-above average strength, Fisto’s main power lies in his large metal right hand. The strength that his fist possesses is far beyond that of a normal clenched fist.

Origin #2 (200X MVP Cartoons)

The older brother of Man-At-Arms, Malcom served as a soldier in the Great Unrest, but was wounded in battle and stricken with magical amnesia. Wandering through Eternia, he settled in the Mystic Mountains in a mining settlement unable to piece together how he lost his battalion. His life changed when the Snake Men attacked his town and he helped save the Masters of the Universe from their trap. But in doing so, Malcom shattered his right hand. In gratitude, Duncan replaced it with a robotic strong arm. Now known as Fisto, he has made up with his brother and fights as a heroic member of the Masters of the Universe, smashing evil with his giant knuckles!

Trivia (Clawful94): Fisto was voiced by Lou Scheimer in the MOTU Filmation Cartoons. Fisto was voiced by Mark Acheson in the 200X MYP Cartoons.